What happens when Jesus returns?

And I saw the beast, the kings of the earth, and their armies, gathered together to make war against Him who sat on the horse and against His army. Then the beast was captured, and with him the false prophet who worked signs in his presence, by which he deceived those who received the mark of the beast and those who worshiped his image. These two were cast alive into the lake of fire burning with brimstone. And the rest were killed with the sword which proceeded from the mouth of Him who sat on the horse. And all the birds were filled with their flesh. Revelation 19.19-21